Daikin VRV 5 RXYA8A7Y1B, Installer And User Manual

Page: 167 / 200

22 | Commissioning
Installer and user reference guide
167
RYMA5+RXYA8~20A7Y1B
VRV 5 heat pump
4P749918-1 – 2023.12
2 Make sure all field settings you want are set; see "21.1 Making field
settings" [
4
141].
3 Turn ON the power to the outdoor unit and the connected indoor units.
NOTICE
Turn ON the power 6 hours before operation in order to have power running to the
crankcase heater and to protect the compressor.
4 Make sure the default (idle) situation is existing; see "21.1.4 To access mode 1
or 2" [
4
143]. Push BS2 for 5 seconds or more. The unit will start test
operation.
Result: The test operation is automatically carried out, the outdoor unit
display will indicate " " and the indication "Test operation" and "Under
centralised control" will display on the user interface of indoor units.
Steps during the automatic system test run procedure:
Step Description
Control before start up (pressure equalisation)
Cooling start up control
Cooling stable condition
Communication check and stop valve check
Pipe length check
Refrigerant amount check
Pump down operation
Unit stop
INFORMATION
During the test operation, it is not possible to stop the unit operation from a user
interface. To abort the operation, press BS3. The unit will stop after ±30 seconds.
5 Check the test operation results on the outdoor unit 7‑segment display.
Completion Description
Normal completion No indication on the 7‑segment display (idle).
Abnormal completion Indication of malfunction code on the 7‑segment display.
Refer to "22.6.2 Correcting after abnormal completion of
the test run" [
4
167] to take actions for correcting the
abnormality. When the test operation is fully completed,
normal operation will be possible after 5 minutes.
22.6.2 Correcting after abnormal completion of the test run
The test operation is only completed if there is no malfunction code displayed on
the user interface or outdoor unit 7‑segment display. In case of a displayed
malfunction code, perform correcting actions as explained in the malfunction code
table. Carry out the test operation again and confirm that the abnormality is
properly corrected.